Life history patterns are correlated with predictable fluctuations in highly seasonal environments of semi-terrestrial burrowing crayfish

Animals living in extreme environments with predictable seasonality may have important life history events correlated to favourable periods. These animals pass critical life stages in protected habitats, especially during early life, often receiving parental care. It is thus hypothesized that juveni...

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Veröffentlicht in:Hydrobiologia 2016-03, Vol.767 (1), p.51-63
Hauptverfasser: Palaoro, A. V, del Valle, E, Thiel, M
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Thiel, M
description Animals living in extreme environments with predictable seasonality may have important life history events correlated to favourable periods. These animals pass critical life stages in protected habitats, especially during early life, often receiving parental care. It is thus hypothesized that juveniles rely on protective microhabitats provided by their parents, becoming independent only during favourable seasons. Semi-terrestrial crayfish Parastacus pugnax inhabit burrows in highly seasonal and predictable environments, thus being well suited to test this hypothesis. Following marked burrows and individual crayfish we examined the life history patterns of P. pugnax in their natural environment to test the predictions that (i) burrowing activity is higher during the wet season, (ii) reproductive events occur during favourable seasons and (iii) juveniles only disperse after reaching larger sizes. There was little or no burrowing activity during the dry season, when soil was more compact, but burrows became wider and had more openings during the wet season. After hatching, juveniles cohabited with adults for at least 4 months during the dry season. During this period juveniles grew considerably, starting independent lives during the wet season. These results suggest that the prolonged parent-offspring cohabitation evolved in response to the predictable seasonal variations in the crayfish habitat.
doi_str_mv 10.1007/s10750-015-2475-y
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identifier ISSN: 0018-8158
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source SpringerLink Journals - AutoHoldings
subjects adults
Animal behavior
Animal populations
Biomedical and Life Sciences
burrows
Cambaridae
Cohabitation
crayfish
Crustaceans
Dry season
Ecology
Freshwater
Freshwater & Marine Ecology
Habitat conservation
Habitats
Hatching
juveniles
Life cycles
Life history
Life Sciences
Microhabitats
Natural environment
Offspring
Parastacus
Parenting
parents
prediction
Primary Research Paper
Protection and preservation
Rainy season
seasonal variation
Seasonal variations
Seasons
soil
wet season
Zoology
title Life history patterns are correlated with predictable fluctuations in highly seasonal environments of semi-terrestrial burrowing crayfish
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